True Random Number Service

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The numbers generated by this widget come from RANDOM.ORG's true random number generator.

What's this fuss about true randomness?

Perhaps you have wondered how predictable machines like
computers can generate randomness. In reality, most random numbers
used in computer programs are pseudo-random, which means they
are generated in a predictable fashion using a mathematical
formula. This is fine for many purposes, but it may not be random
in the way you expect if you're used to dice rolls and lottery drawings.

RANDOM.ORG offers true random numbers to anyone on
the Internet. The randomness comes from atmospheric noise, which
for many purposes is better than the pseudo-random number
algorithms typically used in computer programs. People use RANDOM.ORG for holding drawings, lotteries and sweepstakes, to drive online games, for scientific applications and for art and music.
The service has existed since 1998 and was built by Dr Mads Haahr of the School of Computer Science
and Statistics at Trinity College,
Dublin in Ireland. Today, RANDOM.ORG is operated by Randomness and Integrity Services Ltd.